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JOHN L. NILES MD, PLLC
NPI 1144656364
Clinic/Center - Medical Specialty in Boston, MA

Active since September 19, 2013CLIA 22D2092695 · Certificate of Compliance
101 MERRIMAC ST, 1ST FLOOR, BOSTON, MA 02114(617) 726-4132(617) 726-4213 Get Directions Write a Review

NPPES record last updated: February 4, 2015. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About John L. Niles Md, Pllc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN L. NILES MD, PLLC (NPI 1144656364) is a healthcare organization registered as a medical specialty in Boston, Massachusetts and active in the NPI registry since September 2013. The organization holds a CLIA Certificate of Compliance certificate valid through November 14, 2027 and lists John L Niles, Owner, as its authorized official.

NPPES Registry Identity

NPI1144656364
Entity TypeOrganization
Primary Taxonomy261QM2500X
Legal Business NameJOHN L. NILES MD, PLLC
Location Address101 MERRIMAC ST, 1ST FLOORBoston, MA 02114-4724
Mailing Address101 Merrimac St, 1st FloorBoston, MA 02114-4724 · (617) 726-4132 · Fax (617) 726-4213
Phone(617) 726-4132
Fax(617) 726-4213
Organization SubpartNo
Authorized OfficialJohn L NilesOwner · (617) 726-4132
Enumeration DateSeptember 19, 2013
Last NPPES UpdateFebruary 4, 2015
✔ NPI 1144656364 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Medical SpecialtyAmbulatory Health Care Facilities
Taxonomy Code261QM2500X
License✔ Licensed in MA · 54243
Definition
An entity, facility, or distinct part of a facility providing diagnostic, treatment, and prescriptive services related to a specific area of medical specialization. Frequently used for Title V related Children's Specialty services or to meet specific public health needs (e.g., infectious diseases or breast and cervical cancer).
101 MERRIMAC ST, Boston, MA 02114
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Other Identifiers 1

OtherAA399963MA · Hphc

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Compliance 22D2092695

John L Niles MD, PLLC · Boston, MA
Active · expires Nov 14, 2027
CLIA Number22D2092695
Laboratory TypePhysician Office
Certificate Effective DateNovember 15, 2025
Certificate Expiration DateNovember 14, 2027
Laboratory DirectorJohn L. Niles
Laboratory Phone(617) 726-4132
Laboratory LocationJohn L Niles MD, PLLC101 Merrimac St 1st Fl, Boston, MA 02114
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LAUREN KRISTI RICHARDS PH.D.
Psychologist
101 MERRIMAC ST, SUITE 250
BOSTON, MA 02114
Suffolk County (617) 643-6481
DR. AARON R. HOFFMAN DO
Family Medicine
101 MERRIMAC ST, SUITE 1000
BOSTON, MA 02114
Suffolk County (617) 724-1100
DR. JOHN L NILES MD
Internal Medicine (Nephrology)
101 MERRIMAC ST, 1ST FLOOR
BOSTON, MA 02114
Suffolk County (617) 726-4132
DR. ELIZABETH BERNIER LAMONT MD
Internal Medicine (Medical Oncology)
101 MERRIMAC ST, M01 10
BOSTON, MA 02114
Suffolk County (617) 724-1817
ANN STEWART MSW, LICSW
Social Worker (Clinical)
101 MERRIMAC ST, 250
BOSTON, MA 02114
Suffolk County (617) 643-9334
DR. JESSICA MONIQUE HU M.D.
Internal Medicine
101 MERRIMAC ST, SUITE 1000
BOSTON, MA 02114
Suffolk County (617) 724-1100
LAURA HARWARD LICSW
Social Worker
101 MERRIMAC ST, SUITE 250
BOSTON, MA 02114
Suffolk County (617) 643-7804
MS. MARTHA LOUISE STEWART NP
Nurse Practitioner (Occupational Health)
101 MERRIMAC ST, RM. 420
BOSTON, MA 02114
Suffolk County (617) 726-6370

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John L. Niles MD, PLLC's NPI number?

The NPI number for John L. Niles MD, PLLC is 1144656364. It was assigned to this organization in the NPPES registry on September 19, 2013.

Where is John L. Niles MD, PLLC located?

John L. Niles MD, PLLC is located at 101 Merrimac St 1st Floor, Boston, MA 02114. The listed phone number is (617) 726-4132.

What is John L. Niles MD, PLLC's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Medical Specialty, with taxonomy code 261QM2500X.

Does John L. Niles MD, PLLC hold a CLIA laboratory certificate?

Yes. A Certificate of Compliance (number 22D2092695) is associated with this NPI, valid through November 14, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does John L. Niles MD, PLLC accept?

Health plans from Anthem Blue Cross and Blue Shield list John L. Niles MD, PLLC as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for John L. Niles MD, PLLC was last updated on February 4, 2015. NPI Profile syncs with the weekly NPPES data releases published by CMS.